Industrial Injection PDM-12VSTH - Cummins 5.9L 12 Valve Ported & Polished Cylinder Head w/ Fire Ring Grooves

Cummins 5.9L 12 Valve Ported & Polished Cylinder Head w/ Fire Ring Grooves

The Industrial Injection 5.9L 12v Cummins Port & Polished Heads are designed for the daily driver / weekend warrior in mind. Fully CNC ported heads complete and ready to bolt on.Note: Fire Ring Head Gasket sold separately.The Build Process:Heads are first jet washed in a high pressure spray cabinet to remove oil and dirt, then glass beaded to remove carbon. Next they are checked by magnafluxing, (cast iron only) or pressure testing. They are visually inspected for defects that would make them unusable. Valve guides and seats are removed as needed for porting.Port development is accomplished using a SuperFlow 600 flow bench with a computer recording all flow measurements.Many things are considered when designing a cylinder head Port air flow is only one of the things to think about. Another major concern is port wall thickness.Anyone can get a head to produce high flow numbers, but if doing so leaves the port wall to thin the casting will crack. High performance Diesel heads are more prone to crack because of the thermal shock experienced by excessive intermittent or long term exhaust temperatures. The porting is then preformed using a new 5 Axis CNC Cylinder Head Porting Machine with CAD/CAM software specifically designed for cylinder head porting. CNC porting brings unparalleled accuracy to head porting with each port flowing the same. This helps balance the power that each cylinder produces, making tuning easier. New High Strength Alloy, Heat Treated iron based valve guides are installed. These guides are heat treated to Rockwell 22 Scale, which produces the ultimate in wear resistance. This is far superior to original guide material, including Bronze. The guide incorporates a spiral grove inside the guide to hold oil and aid the lubrication of the valve during engine operation.

Features

• CNC Ported Cylinder Head
• New Stainless Steel Valves
• High Strength Alloy Valve Guides
• Drilled & Tapped Coolant Freeze Plugs In Head
• Fire Ringed Head
• Industrial Injection 150lb Valve Springs

Short Description: Cummins 5.9L 12 Valv

Invoice Description: Cummins 5.9L 12 Valve Ported & Polished

Definition: Engine Cylinder Head